This repository has no description
ci: run one job per check
author
lassulus
date
(Sep 30, 2026, 4:41 PM CEST)
commit
956b5e3a
956b5e3afd57485f4a396cab5e09c89b07c53941
parent
6c1203d5
6c1203d5002919ca8bd653da3ae75eefb091c229
+59
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.github/workflows/ci.yml
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.github/workflows/ci.yml
···
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push:
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pull_request:
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# nix flake check evaluates every host in one process (~19 GB peak), more than
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# the 16 GB RAM of ubuntu-latest. One job per check keeps the peak at the
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# largest single host and shows failing hosts in the run overview.
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jobs:
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list:
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runs-on: ubuntu-latest
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outputs:
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checks: ${{ steps.list.outputs.checks }}
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steps:
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- uses: actions/checkout@v4
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with:
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# Fetch all history for git-based operations
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fetch-depth: 0
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- uses: DeterminateSystems/nix-installer-action@main
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with:
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extra-conf: |
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experimental-features = nix-command flakes
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- uses: DeterminateSystems/magic-nix-cache-action@main
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with:
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use-flakehub: false
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- id: list
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run: |
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checks=$(nix eval --json .#checks.x86_64-linux --apply builtins.attrNames)
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echo "checks=$checks" >> "$GITHUB_OUTPUT"
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check:
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needs: list
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name: ${{ matrix.check }}
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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check: ${{ fromJSON(needs.list.outputs.checks) }}
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steps:
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- uses: actions/checkout@v4
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with:
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# Fetch all history for git-based operations
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fetch-depth: 0
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- uses: DeterminateSystems/nix-installer-action@main
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with:
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extra-conf: |
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experimental-features = nix-command flakes
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- uses: DeterminateSystems/magic-nix-cache-action@main
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with:
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use-flakehub: false
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- run: nix build -L --no-link '.#checks.x86_64-linux.${{ matrix.check }}'
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outputs:
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name: packages and devShells
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
···
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with:
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use-flakehub: false
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- name: Run flake checks
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run: nix flake check
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- run: |
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for output in packages devShells; do
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echo "$output:"
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# shellcheck disable=SC2016 # ${...} is Nix interpolation
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nix eval --raw ".#$output.x86_64-linux" --apply 'xs: builtins.deepSeq (builtins.mapAttrs (_: x: x.drvPath) xs) "${toString (builtins.length (builtins.attrNames xs))} evaluated\n"'
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done